<template>
    <div>
        <!-- 面包屑导航栏 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 消息提示 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab标签区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex" tab-position="left" :before-leave="beforeTabsLeave" @tab-click="tabClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" @click='addGoods' class="addBtn">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览弹框-->
        <el-dialog title="图片预览" :visible.sync="previewImgVisible" width="50%">
            <img :src="previewImg" alt="" class="previewImg">     
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return {
            activeIndex: 0,
            addForm: {
                goods_name: '',
                goods_price: '',
                goods_weight: '',
                goods_number: '',
                goods_cat: [],
                pics: [],
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
                goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
                goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
                goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
                goods_cat: [{ required: true, message: '请输入商品分类', trigger: 'blur' }]
            },
            cateList: [],
            //商品分类级联选择器的配置参数
            cateProps: {
                value: "cat_id",
                label: "cat_name",
                children: "children",
                expandTrigger: true
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj:{
                Authorization: window.sessionStorage.getItem('token')
            },
            previewImg:'',
            previewImgVisible: false,
        }
    },
    created(){
        this.getCateList();
    },
    methods:{
        async getCateList(){
            const {data : res} = await this.$http.get('categories');
            if(res.meta.status != 200) return this.$message.error('获取商品分类数据失败');
            this.cateList = res.data;
            // console.log(this.cateList);
        },
        handleChange(){
            // console.log(this.addForm.goods_cat);
            if(this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = [];
                return;
            }

        },
        //阻止Tabs标签的随意切换
        beforeTabsLeave(activeName,oldActiveName){
            // console.log(activeName,oldActiveName);
            if(oldActiveName == 0 && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请输入商品分类');
                return false;
            }
        },
        //点击tab标签从后台获取动态参数
        async tabClick(){
            // console.log(this.activeIndex);
            if(this.activeIndex == 1){
                const {data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:"many"}});
                if(res.meta.status != 200) return this.$message.error('获取动态参数失败');
                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.split(' ');
                })
                this.manyTableData = res.data;
                // console.log(this.manyTableData);
            }else if(this.activeIndex == 2){
                const {data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:"only"}});
                if(res.meta.status != 200) return this.$message.error('获取静态属性失败');
                this.onlyTableData = res.data;
            }
        },
        //实现点击图片名称进行预览的功能
        handlePreview(file){
            console.log(file);
            this.previewImg = file.response.data.url;
            this.previewImgVisible = true;
        },
        handleRemove(file){
            const filePath = file.response.data.tmp_path;
            const index = this.addForm.pics.findIndex(item => item.pic === filePath);
            this.addForm.pics.splice(index,1);
            console.log(this.addForm);
        },
        handleSuccess(res){
            const picInfo = {pic:res.data.tmp_path};
            this.addForm.pics.push(picInfo);
            console.log(this.addForm);
        },
        addGoods(){
            console.log(this.addForm);
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return this.$message.error('请输入必填的选项');
                const form = _.cloneDeep(this.addForm);
                form.goods_cat = form.goods_cat.join(',');
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo);
                })
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo);
                })
                form.attrs = this.addForm.attrs;
                // console.log(form);
                const {data : res} = await this.$http.post('goods',form);
                if(res.meta.status != 201) return this.$message.error(res.meta.msg);
                this.$message.success('添加商品成功');
                this.$router.push('/goods');
            })
        }
    },
    computed:{
        cateId(){
            return this.addForm.goods_cat.length === 3 ? this.addForm.goods_cat[2] : null;
        }
    }
}
</script>
<style lang="less" scoped>
    .el-checkbox {
        margin: 0 15px 0 0 !important;
    }
    .previewImg {
        width: 100%;
    }
    .addBtn {
        margin-top: 15px;
    }
</style>